with a degree in the field of counseling or psychology from capella university, you'll have the knowledge to make a difference in the lives of others. let's get started at capella.edu >>> authorities are trying to get a more complete picture of the connecticut gunman. what could possibly trigger a human being to do what this man did. the suspected shooter was young, he was white, he was male. to help us with some answers, we want to bring in jim clemente. he's a writer for the program, "criminal minds." we appreciate you taking time. we were talking to the reporter from "hartford current" whose article was entitled methodical when he was describing this crime. methodical is a very hard and awful word to use when talking about something like this. when it was preplanned and premeditated. what can cause a person to do this. well. >> well i think in this case it could be anything from psychosis, mental illness to a slow burn. you know and a justice collector. someone who is has built up these angers and rage over years. but in this case, the mix of that mental illness or psychosis, plus the